A $300 million cash-for-clunkers-type federal program to boost sales of energy-efficient home appliances provides a glimmer of hope for beleaguered makers of washing machines and dishwashers, but it's probably not enough to lift companies such as Whirlpool (WHR) and Electrolux out of the worst down cycle in the sector's history.

Beginning late this fall, the program authorizes rebates of $50 to $200 for purchases of high-efficiency household appliances. The money is part of the broader economic stimulus bill passed earlier this year.